1 Samuel 23:9

Secretly. He might have pretended that the armament was against the Philistines. (Menochius) --- Ephod. Some say that David put it on. But this was the privilege of the high priest, who gave the answer to David's consultation, which he might perhaps repeat after him. (Calmet) --- He put on the rational to consult God, Exodus xxviii., and Leviticus viii. (Worthington)